US20220089614A1 - Sodium squarate hexahydrate complex - Google Patents
Sodium squarate hexahydrate complex Download PDFInfo
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- US20220089614A1 US20220089614A1 US17/449,663 US202117449663A US2022089614A1 US 20220089614 A1 US20220089614 A1 US 20220089614A1 US 202117449663 A US202117449663 A US 202117449663A US 2022089614 A1 US2022089614 A1 US 2022089614A1
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- complex
- hexahydrate
- squarate
- sodium
- dichloromethane
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- -1 Sodium squarate hexahydrate Chemical class 0.000 title claims abstract description 20
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000013078 crystal Substances 0.000 claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 8
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000004440 column chromatography Methods 0.000 claims abstract description 6
- PWEBUXCTKOWPCW-UHFFFAOYSA-N squaric acid Chemical compound OC1=C(O)C(=O)C1=O PWEBUXCTKOWPCW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 238000002390 rotary evaporation Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 claims description 5
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- LEIMLDGFXIOXMT-UHFFFAOYSA-N trimethylsilyl cyanide Chemical compound C[Si](C)(C)C#N LEIMLDGFXIOXMT-UHFFFAOYSA-N 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 238000007259 addition reaction Methods 0.000 claims 1
- 238000002447 crystallographic data Methods 0.000 claims 1
- 239000003480 eluent Substances 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 claims 1
- 239000010439 graphite Substances 0.000 claims 1
- PWEBUXCTKOWPCW-UHFFFAOYSA-L squarate Chemical compound [O-]C1=C([O-])C(=O)C1=O PWEBUXCTKOWPCW-UHFFFAOYSA-L 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 238000001308 synthesis method Methods 0.000 abstract description 3
- 239000011734 sodium Substances 0.000 description 117
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 9
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- LWDUMIQGGLFBOO-UHFFFAOYSA-J [H]O([H])->[Na]1Oc2c(O)c(=O)c2=O->[Na]2(<-O([H])[H])O(c3c(O)c(=O)c3=O->1)->[Na]1(<-O=c3c(O[Na](<-O=c4c(O->21)c(O)c4=O)<-O([H])[H])c(O)c3=O)<-O([H])[H] Chemical compound [H]O([H])->[Na]1Oc2c(O)c(=O)c2=O->[Na]2(<-O([H])[H])O(c3c(O)c(=O)c3=O->1)->[Na]1(<-O=c3c(O[Na](<-O=c4c(O->21)c(O)c4=O)<-O([H])[H])c(O)c3=O)<-O([H])[H] LWDUMIQGGLFBOO-UHFFFAOYSA-J 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BHNDPPWXTRPBNQ-UHFFFAOYSA-J COO.N.O=c1c(O)c(O)c1=O.[H]O([H])->[Na]1Oc2c(O)c(=O)c2=O->[Na]2(<-O([H])[H])O(c3c(O)c(=O)c3=O->1)->[Na]1(<-O=c3c(O[Na](<-O=c4c(O->21)c(O)c4=O)<-O([H])[H])c(O)c3=O)<-O([H])[H] Chemical compound COO.N.O=c1c(O)c(O)c1=O.[H]O([H])->[Na]1Oc2c(O)c(=O)c2=O->[Na]2(<-O([H])[H])O(c3c(O)c(=O)c3=O->1)->[Na]1(<-O=c3c(O[Na](<-O=c4c(O->21)c(O)c4=O)<-O([H])[H])c(O)c3=O)<-O([H])[H] BHNDPPWXTRPBNQ-UHFFFAOYSA-J 0.000 description 1
- BMFIQCRSWDCVCY-UHFFFAOYSA-N C[Si](C)(C)C#N.C[Si](C)(C)OC(C#N)c1ccccc1.[H]C(=O)c1ccccc1 Chemical compound C[Si](C)(C)C#N.C[Si](C)(C)OC(C#N)c1ccccc1.[H]C(=O)c1ccccc1 BMFIQCRSWDCVCY-UHFFFAOYSA-N 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 241000270338 Squamata Species 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- BHXFKXOIODIUJO-UHFFFAOYSA-N benzene-1,4-dicarbonitrile Chemical compound N#CC1=CC=C(C#N)C=C1 BHXFKXOIODIUJO-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- XQTIWNLDFPPCIU-UHFFFAOYSA-N cerium(3+) Chemical compound [Ce+3] XQTIWNLDFPPCIU-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- 150000004696 coordination complex Chemical group 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- NWYYWIJOWOLJNR-RXMQYKEDSA-N l-valinol Chemical compound CC(C)[C@H](N)CO NWYYWIJOWOLJNR-RXMQYKEDSA-N 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 150000007517 lewis acids Chemical group 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000012450 pharmaceutical intermediate Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- UNUVOQUVNRHMOA-UHFFFAOYSA-L sodium squarate Chemical compound [Na+].[Na+].[O-]C1=C([O-])C(=O)C1=O UNUVOQUVNRHMOA-UHFFFAOYSA-L 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
- C07F1/04—Sodium compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
- C07F1/005—Compounds containing elements of Groups 1 or 11 of the Periodic Table without C-Metal linkages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/22—Organic complexes
- B01J31/2204—Organic complexes the ligands containing oxygen or sulfur as complexing atoms
- B01J31/2208—Oxygen, e.g. acetylacetonates
- B01J31/2213—At least two complexing oxygen atoms present in an at least bidentate or bridging ligand
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
- C07F7/1872—Preparation; Treatments not provided for in C07F7/20
- C07F7/188—Preparation; Treatments not provided for in C07F7/20 by reactions involving the formation of Si-O linkages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
- B01J2231/34—Other additions, e.g. Monsanto-type carbonylations, addition to 1,2-C=X or 1,2-C-X triplebonds, additions to 1,4-C=C-C=X or 1,4-C=-C-X triple bonds with X, e.g. O, S, NH/N
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/10—Complexes comprising metals of Group I (IA or IB) as the central metal
- B01J2531/12—Sodium
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/13—Crystalline forms, e.g. polymorphs
Definitions
- the present disclosure relates to a novel compound and use thereof, and in particular to a sodium complex and a preparation method thereof, exactly preparation and use of a sodium squarate hexahydrate complex
- a sodium squarate complex is a metal complex. Compounds similar to it have been reported in literature. [1-2] since it is a Lewis acid reagent, it can be developed to be used as an organic catalyst and a pharmaceutical intermediate.
- the present disclosure is directed to provide a sodium squarate hexahydrate complex, and a technical problem to be solved is to obtain a target product by one-step synthesis.
- the sodium squarate hexahydrate complex referred in the present disclosure is a compound shown by the following chemical formula, which is prepared by reacting squamate with ammonium formate and sodium hydroxide:
- complex (I) sodium squarate hexahydrate complex
- the compound shows a relatively better catalytic performance in a nitrile silicification reaction of benzaldehyde with a conversion rate up to 34.8%.
- a synthesis method of the sodium squarate hexahydrate complex includes synthesizing and separating.
- the synthesizing is dissolving 0.6621 g of squaric acid, 2.6128 g of ammonium formate and 0.0480 g of a palladium complex in 100 ml of absolute methanol, and heating and stirring to reflux for 48 h; then stopping the reaction, subsequently adding 10 mL of a 1M HCl solution, and extracting with 3 ⁇ 15 mL of dichloromethane; then washing a combined extraction solution again with 15 mL of a 12M NaOH solution, and extracting again with 3 ⁇ 15 mL of dichloromethane; subjecting the combined extraction solution to rotary evaporation and separation through column chromatography to obtain a colorless crystal complex.
- the present synthesis method obtains a target product in one step, with a simple process and convenient operations.
- reaction mechanism of this reaction can be speculated as follows: the unreacted squaric acid interacts with sodium hydroxide to dehydrate, and undergoes a series of changes under the action of the palladium catalyst to form the sodium complex.
- FIG. 1 is an X-ray diffraction analysis pattern of the sodium squarate hexahydrate complex.
- 0.6621 g of squaric acid, 2.6128 g of ammonium formate and 0.0480 g of a palladium complex were weighed and dissolved in 100 ml of anhydrous methanol, and heated and stirred to reflux for 48 h. Then the reaction was stopped, and subsequently the mixture was added with 10 mL of a 1M HCl solution and extracted with 3 ⁇ 15 mL of dichloromethane. Then the combined extraction solution was washed again with 15 mL of a 12M NaOH solution and extracted again with 3 ⁇ 15 mL of dichloromethane.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Disclosed is a sodium squarate hexahydrate complex of the structural formula (I). Its synthesis method includes the following steps. 0.6621 g of squaric acid, 2.6128 g of ammonium formate and 100 ml of anhydrous methanol are weighed and put into a 250 mL round-bottom flask, and heated and stirred to reflux for 48 h, then the reaction is stopped, subsequently the flask is added with 10 mL of a 1M HCl solution, and extracted with 3×15 mL of dichloromethane, and then a combined extraction solution is washed again with 15 mL of a 12M NaOH solution, and extracted again with 3×15 mL of dichloromethane. The extraction solution is subjected to rotary evaporation and separation through column chromatography to obtain a crystal complex; the use of this sodium squarate hexahydrate complex (I) is to use the sodium squarate hexahydrate complex (I) as a catalyst.
Description
- The present disclosure relates to a novel compound and use thereof, and in particular to a sodium complex and a preparation method thereof, exactly preparation and use of a sodium squarate hexahydrate complex
- A sodium squarate complex is a metal complex. Compounds similar to it have been reported in literature. [1-2] since it is a Lewis acid reagent, it can be developed to be used as an organic catalyst and a pharmaceutical intermediate.
-
- 1. Temperature Controlled Reversible Change of the Coordination Modes of the Highly Symmetrical Multitopic Ligand To Construct Coordination Assemblies: Experimental and Theoretical Studies. Zheng, Bo; Dong, Hao; Bai, Junfeng; Li, Yizhi; Li, Shuhua; Scheer, Manfred, Journal of the American Chemical Society (2008), 130, (25), 7778-7779.
- 2. Lanthanide(III) squarates. 2. High diversity of rare coordination modes of the squarate anion in a series of weakly hydrated cerium(III) squarates prepared by pseudo-hydrothermal methods, Trombe, Jean Christian; Petit, Jean Francois; Gleizes, Alain, Inorganica Chimica Acta (1990), 167(1), 69-81.
- The present disclosure is directed to provide a sodium squarate hexahydrate complex, and a technical problem to be solved is to obtain a target product by one-step synthesis.
- The sodium squarate hexahydrate complex referred in the present disclosure is a compound shown by the following chemical formula, which is prepared by reacting squamate with ammonium formate and sodium hydroxide:
- chemical name: sodium squarate hexahydrate complex, referred to as a complex (I) for short. The compound shows a relatively better catalytic performance in a nitrile silicification reaction of benzaldehyde with a conversion rate up to 34.8%.
- A synthesis method of the sodium squarate hexahydrate complex includes synthesizing and separating. The synthesizing is dissolving 0.6621 g of squaric acid, 2.6128 g of ammonium formate and 0.0480 g of a palladium complex in 100 ml of absolute methanol, and heating and stirring to reflux for 48 h; then stopping the reaction, subsequently adding 10 mL of a 1M HCl solution, and extracting with 3×15 mL of dichloromethane; then washing a combined extraction solution again with 15 mL of a 12M NaOH solution, and extracting again with 3×15 mL of dichloromethane; subjecting the combined extraction solution to rotary evaporation and separation through column chromatography to obtain a colorless crystal complex.
- The synthesis reaction is as follows:
- The present synthesis method obtains a target product in one step, with a simple process and convenient operations.
- The reaction mechanism of this reaction can be speculated as follows: the unreacted squaric acid interacts with sodium hydroxide to dehydrate, and undergoes a series of changes under the action of the palladium catalyst to form the sodium complex.
-
FIG. 1 is an X-ray diffraction analysis pattern of the sodium squarate hexahydrate complex. - Into a 100 mL two-necked flask added were 1.4054 g (10.64 mmol) of anhydrous ZnCl2, 40 ml of chlorobenzene, 5.0236 g (39.2 mmol) of 1,4-dicyanobenzene and 16.2075 g of L-valinol under anhydrous and oxygen-free conditions. The mixture was refluxed at a high temperature for 60 h, then the reaction was stopped, and the solvent was removed under reduced pressure. The residue was dissolved with water and extracted with CHCl3 (20 mL×2). The organic phase was dried over anhydrous sodium sulfate and the solvent was removed by rotation. The crude product was subjected to column chromatography with petroleum ether/dichloromethane (4:1) to obtain a light green viscous liquid with a yield of 52%; white crystal with a melting point of: 48-50° C., [a]5D=+111.9° (c=0.429, CHCl3); 1HNMR (500 MHz, CDCl3, 27° C.), δ(ppm)=7.97 (s, 4H), 4.39-4.43 (t, 3.18 Hz, 1H), 4.09-4.15 (m, 2H), 1.85-1.86 (m, 1H), (d, J=6.24 Hz, 6H), 0.86-0.96 (d, J=6.24 Hz, 6H). 13CNMR 18.13, 19.03, 32.85, 70.26, 72.76, 128.10, 128.16, 130.32, 162.82. IR: 3273, 2976, 2960, 2932, 2889, 2869, 1643, 1512, 1469, 1408, 1382, 1366, 1350, 1320, 1296, 1276, 1214, 1180, 1108, 1077, 1047, 1014, 971, 955, 900, 891, 838, 726, 698, 675, 659, 540. HRMS(EI): m/z (%): calcd for C18H24N2O2: 300.1838; found: 300.1833.
- Into a 100 mL two-necked flask added were 1.5603 g (4.92 mmol) of palladium chloride, 1.0435 g (3.48 mmol) of 1,4-(4R)-diisopropyl-2-oxazolinylbenzene and 30 mL of chlorobenzene. The mixture was refluxed at high temperature for 48 h, the reaction was stopped, and the solvent was removed under reduced pressure. The residue was dissolved in trichloromethane and ethanol, and subjected to natural volatilization of the solvent to obtain a reddish brown complex as a crystal with a yield: 92%; m.p.: >200° C., [a]5D=+512.8° (c 0.0564, CH3OH); 1H NMR (600 MHz, CDCl3), δ ppm 8.81 (s, 8H, ArH), 4.61-4.63 (m, 4H, CH×4), 4.53 (t, J=9.6 Hz, 4H, CH×4), 4.44 (t, J=8.5 Hz, 4H, CH×4), 3.07-3.10 (m, 4H), 1.18 and 1.15 (dd, J=6.7, 7.2 Hz, 24H, CH3×4); 13C NMR (150 MHz, CDCl3) ppm 166.8, 130.1 (×2), 129.3, 72.0, 69.1, 30.7, 19.0, 15.6; νmax (cm−1) 3487, 3049, 2957, 2929, 2872, 1642, 1609, 1572, 1509, 1480, 1464, 1416, 1379, 1331, 1288, 1246, 1178, 1141, 1123, 1099, 1045, 1018, 959, 933, 899, 854, 804, 770, 722, 693, 438; elemental analysis of C36H48N4Cl4O4Pd2, test value: C, 45.26%, H, 5.06%, N, 5.86%; theoretical value: C, 45.32%, H, 5.24%, N, 5.48%;
- 0.6621 g of squaric acid, 2.6128 g of ammonium formate and 0.0480 g of a palladium complex were weighed and dissolved in 100 ml of anhydrous methanol, and heated and stirred to reflux for 48 h. Then the reaction was stopped, and subsequently the mixture was added with 10 mL of a 1M HCl solution and extracted with 3×15 mL of dichloromethane. Then the combined extraction solution was washed again with 15 mL of a 12M NaOH solution and extracted again with 3×15 mL of dichloromethane. The extraction solution was subjected to rotary evaporation and separation through column chromatography to obtain 0.3852 g of a crystal complex with a melting point >250° C.; elemental analysis data: theoretical value: C: 26.68%; H: 2.80%; measured value: 6.87%; H: 2.63%; IR spectral data: (KBr; v,cm−1): 3347, 3111, 3032, 2916, 2849, 1597, 1539, 1439, 1393, 1142, 1078, 880, 825, 710; and the crystal data of the compound:
-
empirical formula C16H20Na4O26 molecular weight 720.28 temperature 293(2) K wavelength 0.71073 Å crystal system, space group monoclinic system, C 2/c lattice parameter a = 24.567(15) Å alpha = 90 deg. b = 3.580(2) Å beta = 90 deg. c = 15.837(10) Å gamma = 90 deg. volume 1380.2(5) Å{circumflex over ( )}3 charge density 2, 1.731 Mg/m{circumflex over ( )}3 absorption correction parameter 0.218 mm{circumflex over ( )}−1 number of electrons in a single 736 lattice crystal size 0.110 × 0.060 × 0.040 mm range of Theta angle 2.592 to 24.996 scope of HKL index collection −28 <= h <= 28, −4 <= k < 4, −18 <= l <= 18 collected/independent diffraction 6015/1204 [R(int) = 0.0909] data data integrity of theta = 30.5 95.9% absorption correction method multilayer scanning maximum and minimum 0.7456 and 0.5760 transmittances method used for refinement matrix least square method of F{circumflex over ( )}2 number of data/limited number 1204/0/104 for usage/number of parameters method used for refinement 1.170 consistency factor of diffraction R1 = 0.0948, wR2 = 0.2362 points coincidence factor of observable R1 = 0.1306, wR2 = 0.2598 diffraction Maximum peak and valley on 0.450 and −0.550e.A{circumflex over ( )}−3 differential Fourier diagram -
-
Na(1)-O(5) 2.347(6) Na(1)-O(4) 2.350(5) Na(1)-O(1)#1 2.397(5) Na(1)-O(5)#2 2.401(6) Na(1)-O(1)#3 2.445(5) Na(1)-O(1)#4 2.585(6) Na(1)-Na(1)#5 3.580(2) Na(1)-Na(1)#2 3.580(2) Na(1)-Na(1)#6 3.580(4) Na(1)-Na(1)#7 3.580(4) O(1)-C(1) 1.235(8) O(1)-Na(1)#8 2.397(5) O(1)-Na(1)#3 2.445(5) O(1)-Na(1)#4 2.585(6) O(2)-C(2) 1.232(8) O(3)-C(3) 1.259(7) O(4)-C(4) 1.281(8) C(1)-C(4) 1.447(8) C(1)-C(2) 1.474(9) C(2)-C(3) 1.475(8) C(3)-C(4) 1.430(9) O(5)-Na(1)#5 2.401(6) O(5)-H(5A) 0.8503 O(5)-H(5B) 0.8499 O(6)-H(6A) 0.9482 O(6)-H(6B) 0.8497 O(7)-H(7A) 0.8540 O(7)-H(7B) 0.8584 -
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O(5)-Na(1)-O(4) 91.08(17) O(5)-Na(1)-O(1)#1 93.11(18) O(4)-Na(1)-O(1)#1 173.1(2) O(5)-Na(1)-O(5)#2 97.88(18) O(4)-Na(1)-O(5)#2 88.28(18) O(1)#1-Na(1)-O(5)#2 96.55(17) O(5)-Na(1)-O(1)#3 175.2(2) O(4)-Na(1)-O(1)#3 87.48(17) O(1)#1-Na(1)-O(1)#3 87.90(17) O(5)#2-Na(1)-O(1)#3 86.7(2) O(5)-Na(1)-O(1)#4 84.69(19) O(4)-Na(1)-O(1)#4 90.18(17) O(1)#1-Na(1)-O(1)#4 84.77(16) O(5)#2-Na(1)-O(1)#4 177.03(19) O(1)#3-Na(1)-O(1)#4 90.70(17) O(5)-Na(1)-Na(1)#5 41.63(14) O(4)-Na(1)-Na(1)#5 91.86(14) O(1)#1-Na(1)-Na(1)#5 87.66(14) O(5)#2-Na(1)-Na(1)#5 139.51(14) O(1)#3-Na(1)-Na(1)#5 133.78(13) O(1)#4-Na(1)-Na(1)#5 43.08(12) O(5)-Na(1)-Na(1)#2 138.38(14) O(4)-Na(1)-Na(1)#2 88.14(14) O(1)#1-Na(1)-Na(1)#2 92.34(14) O(5)#2-Na(1)-Na(1)#2 40.49(14) O(1)#3-Na(1)-Na(1)#2 46.22(13) O(1)#4-Na(1)-Na(1)#2 136.92(12) Na(1)#5-Na(1)-Na(1)#2 180.0 O(5)-Na(1)-Na(1)#6 90.59(12) O(4)-Na(1)-Na(1)#6 131.71(17) O(1)#1-Na(1)-Na(1)#6 42.84(13) O(5)#2-Na(1)-Na(1)#6 139.08(14) O(1)#3-Na(1)-Na(1)#6 86.93(15) O(1)#4-Na(1)-Na(1)#6 42.01(10) Na(1)#5-Na(1)-Na(1)#6 60.00(4) Na(1)#2-Na(1)-Na(1)#6 120.00(4) O(5)-Na(1)-Na(1)#7 139.27(14) O(4)-Na(1)-Na(1)#7 129.27(16) O(1)#1-Na(1)-Na(1)#7 46.18(14) O(5)#2-Na(1)-Na(1)#7 89.73(12) O(1)#3-Na(1)-Na(1)#7 41.81(10) O(1)#4-Na(1)-Na(1)#7 89.27(14) Na(1)#5-Na(1)-Na(1)#7 120.00(4) Na(1)#2-Na(1)-Na(1)#7 60.00(4) Na(1)#6-Na(1)-Na(1)#7 59.99(9) C(1)-O(1)-Na(1)#8 126.5(4) C(1)-O(1)-Na(1)#3 128.0(4) Na(1)#8-O(1)-Na(1)#3 95.35(17) C(1)-O(1)-Na(1)#4 114.2(4) Na(1)#8-O(1)-Na(1)#4 91.81(17) Na(1)#3-O(1)-Na(1)#4 90.71(17) C(4)-O(4)-Na(1) 134.5(4) O(1)-C(1)-C(4) 136.1(6) O(1)-C(1)-C(2) 134.6(5) C(4)-C(1)-C(2) 89.3(5) O(2)-C(2)-C(1) 136.2(6) O(2)-C(2)-C(3) 134.8(6) C(1)-C(2)-C(3) 89.0(5) O(3)-C(3)-C(4) 135.9(6) O(3)-C(3)-C(2) 134.2(6) C(4)-C(3)-C(2) 89.9(5) O(4)-C(4)-C(3) 133.2(5) O(4)-C(4)-C(1) 135.0(6) C(3)-C(4)-C(1) 91.8(5) Na(1)-O(5)-Na(1)#5 97.88(18) Na(1)-O(5)-H(5A) 112.7 Na(1)#5-O(5)-H(5A) 97.6 Na(1)-O(5)-H(5B) 127.6 Na(1)#5-O(5)-H(5B) 112.7 H(5A)-O(5)-H(5B) 104.5 H(6A)-O(6)-H(6B) 85.3 H(7A)-O(7)-H(7B) 103.4. -
- 0.05 mmol of a compound I, 0.1 ml of benzaldehyde, 0.3 ml (3.3 mmol) of TMSCN, and the sodium squarate hexahydrate complex of 2 were added sequentially at 20-30° C. After 20 hours, the reaction was quenched by addition of water and subjected to column chromatography (petroleum ether/dichloromethane: 5/1) to obtain a colorless oily liquid with a conversion rate of 34.8%; 1H NMR (300 MHz, CDCl3) 7.56-7.59 (m, 0.9 Hz, 2H), 7.31-7.34 (m, 3H), 5.43 (s, 1H), 0.16 (s, 9H).
Claims (4)
2. The sodium squarate hexahydrate (I) according to claim 1 , wherein when diffraction data is collected in a ω-θ scanning manner with a MoKα ray (λ=0.71073 Å) monochromatized by a graphite monochromator on a Oxford X-ray single-crystal diffractometer at a temperature of 293(2) K, it is characterized in that a crystal belongs to a monoclinic system, the space group is: C 2/C, and lattice parameters of the crystal are: a=24.567(15) Å alpha=90 deg; b=3.580(2) Å beta=90 deg; c=15.837(10) Å gamma=90 deg.
3. A method for synthesizing the sodium squarate hexahydrate complex (I) according to claim 1 , comprising synthesizing, separating and purifying, wherein the synthesizing is weighing and putting 0.6621 g of squaric acid, 2.6128 g of ammonium formate and 100 ml of anhydrous methanol into a 250 mL round-bottom flask, and heating and stirring to reflux for 48 h; then stopping the reaction, subsequently adding 10 mL of a 1M HCl solution, and extracting with 3×15 mL of dichloromethane; then washing a combined extraction solution again with 15 mL of a 12M NaOH solution, and extracting again with 3×15 mL of dichloromethane; subjecting the extraction solution to rotary evaporation and separation through column chromatography with dichloromethane and anhydrous methanol according to a volume ratio of 9:1 as an eluent, and collecting a final component point to obtain the crystal complex (I).
4. Use of the sodium squarate hexahydrate complex (I) according to claim 1 , wherein the sodium squarate hexahydrate complex is used as a catalyst in an addition reaction of benzaldehyde and trimethylsilyl nitrile with a conversion rate up to 34.8%.
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